That's only the case when there are actual games on, and I think you'll agree that games are few and far between. Clubs have games on every week and for bigger clubs, each game is scrutinized intensely, especially if you're not winning. On top of that, you have off the field issues associated with corrupt owners, player power, player behaviour, finances, illegal dealings, points deduction (heh), and numerous pundits taking constant shots at your team and management skills. Especially when you're not winning. Managers lose their jobs far more frequently than it will ever happen in national team football. I'm not saying there is no scrutiny - that is, of course, part of the job. However, it's still not at the level of club football.